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[SPIKE] Configure iframe-resizer for reduced CPU usage #3028

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[SPIKE] Configure iframe-resizer for reduced CPU usage #3028

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18 changes: 16 additions & 2 deletions src/javascripts/components/example.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -21,14 +21,28 @@ Example.prototype.init = function () {
return
}

var options = {
// Initial resize only, no event listeners
autoResize: false,

// Calculate height from `data-iframe-height` only
heightCalculationMethod: 'taggedElement',

// Calculate height from iframe contents only
resizeFrom: 'child',

// Skip iframe `scrolling` attribute
scrolling: 'omit'
}

// Initialise asap for eager iframes or browsers which don't support lazy loading
if (!('loading' in $module) || $module.loading !== 'lazy') {
return iFrameResize({ scrolling: 'omit' }, $module)
return iFrameResize(options, $module)
}

$module.addEventListener('load', function () {
try {
iFrameResize({ scrolling: 'omit' }, $module)
iFrameResize(options, $module)
} catch (err) {
if (err) {
console.error(err.message)
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1 change: 1 addition & 0 deletions views/layouts/layout-example.njk
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Expand Up @@ -24,6 +24,7 @@
{% block header %}{% endblock %}

{% set bodyClasses = "app-example-page" %}
{% set bodyAttributes = { "data-iframe-height": "" } %}

{% block main %}
<!-- Disable browser validation for any examples that include form elements -->
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